Model
Digital Document
Publisher
Florida Atlantic University
Description
The influence of selected iron chelating agents upon corrosion
and cracking of steel reinforced concrete has been investigated.
Five chelating agents including EDTA, DTPA,
TEA, HEDTA and Chel-138 were used. The experiments involved
determination of (1) the influence of iron chelating agents
on iron solubility limit, (2) the effect of admixtures
upon compressive strength of concrete, (3) the influence of
chelating admixtures upon steel corrosion and (4) cracking
resistance of concrete specimens with and without selected
iron chelating agents. Results from test groups (1) and
(3) were encouraging; however, compressive strength of concrete
specimens with admixtures was less than for specimens
with no admixture. In addition, specimens with chelating
admixtures had approximately 5.5 to 82 percent shorter
cracking time than for the no admixture ones. Explanations
for this are presented, and certain conclusions are reached
regarding the usefulness of a chelating admixture for mitigating concrete cracking.
and cracking of steel reinforced concrete has been investigated.
Five chelating agents including EDTA, DTPA,
TEA, HEDTA and Chel-138 were used. The experiments involved
determination of (1) the influence of iron chelating agents
on iron solubility limit, (2) the effect of admixtures
upon compressive strength of concrete, (3) the influence of
chelating admixtures upon steel corrosion and (4) cracking
resistance of concrete specimens with and without selected
iron chelating agents. Results from test groups (1) and
(3) were encouraging; however, compressive strength of concrete
specimens with admixtures was less than for specimens
with no admixture. In addition, specimens with chelating
admixtures had approximately 5.5 to 82 percent shorter
cracking time than for the no admixture ones. Explanations
for this are presented, and certain conclusions are reached
regarding the usefulness of a chelating admixture for mitigating concrete cracking.
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